Harrow attachment



(No Model.) T W. P. KIRKLAND.

HARROW ATTACHMENT. No. 284,307. Patented Sept. 4, 1883.

' UNITED STATES PATENT OFFICE.

WILLIAM r. KIRKLAND, or sAN FRANCIsCo, CALIFORNIA.

HARROW ATTACH M ENT.

i'SPECIFICATION formingpart of Letters Patent No; 284,307, dated September 4, 1883.

State of California, have invented a new and useful Harrow Attachment to Free the Teeth when Clogged or Fouled, of which the following is a specification. V

In the harrowing of lands the harrow frequent- 1y becomes foul or clogged by the accumulation of gathered-up weeds, brush, straw, &c.,which neutralizes in a great degree th'e eifect of the teeth upon the soil and requires a frequent lifting up of the harrow-frame, so that the rubbish may be discharged, hence the object of my invention is to provide a means where'- i by the harrow is liftednp in anautomatic manner and frees itself of such accumulations.

I accomplish this object by the means illustrated in the accompanying drawings, in Which Figure l is a top View of a harrow embodying my improvements, and Fig. 2 is a sectional side view.

Similar letters of reference are used to indi- Cate like parts throughout the several views.

The harrow-frame is provided with a seg-.

mental wheel or sector, A, one or more, that may be placed one on each side, as shown in the drawings; or such sectors may be. placed within each division of the harrow-frameat a,

convenient distance from the drawing end. The sector is composed of suitable teethor arms, 13 B, and "is mounted upon an axle, 0, having its bearings or journals upon the harrow-frame. From the sector extends an. op-

, crating or tripping arm, D, which arm, when disengagechrests upon the end piece of the I barrow-frame.

The boxings E of the axle are elongated, so that the toothed segment and axle may bedrawn backward and permit the arm D to fall down and engage with the ground or earth; and to accomplish this obj ect a drawbar, F, is connected to the center of the axle and extends backto the rear end of the harrow-frame, passing through a boxing, G, and

terminating in a crank -arm, H. A spiral spring, I, is placed around a journal formed on the end ofthe draw-bar, which has its bearings against the collar J and boxing G,

. so that when the operating bar is drawn backward the spring will be compressed between Application filed November 27,1882. (No model.)

these two points, and when the hand of the operator releases the crank-arm the spring will expand and carry the draw-bar forward. In practice the sliding bar F is drawn back- Ward by the crank or handle, carrying with it I the segmental toothed wheel, the axle of which moves back in the elongated journals, which permits the end of the arm D to fall to the ground, causing the barrow-frame to be ele vated sufficiently to allow the accumulated rubbish to pass from under the harrow, or rather permitting the harrow to pass over it and clear itself of any obstructions which may interfere with the proper action of the teeth, and at the same time the segmented wheel will arm assume its former position upon the frame, the reaction of the coiled spring. carrying back theaxle against theopposite endsof the elongated boxes, while the teeth of the segment will enter the ground to assist in the revolution and. keep the harrow away from the ground until the obstruction is passed.

Thespring for disengaging the arm and returning it to its resting-place uponthe harroW-frame may be either spiral or elliptical.

The last or elliptical is preferred. j

Theattachment may be applied to almost any kind of harrow upon one or both sides thereof, and a pair of old light wagon-Wheels may be reducedin size and used for the seg mental wheels. a

Having thus described my invention, what I perform an entire revolution,and the end of the claim, and desire to secure by Letters Patent,

In combination with the toothed sector, provided with an outwardly-extended arm adapted to rest upon the barrow-frame, the elongated axle-bearings, 'andthe spring-provided.

draw-bar connected to the axle of the toothed sector, so that by operating the spring drawbar the end of the arm will fall to the ground and be returned to its resting-place, substantially in the manner and for the purpose herein setforth and specified.

In testimony that I claim the; foregoing I have hereunto set my handand seal this 15th day of November, 1882. V

WILLIAM KIRKLAND. pt. s]. Witnesses:

O. W. M. SMITH, OHAs. E. KELLY. 

